diff options
Diffstat (limited to 'block/compat_ioctl.c')
| -rw-r--r-- | block/compat_ioctl.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c index 219b7e76e8ad..5c6dafaad938 100644 --- a/block/compat_ioctl.c +++ b/block/compat_ioctl.c @@ -36,6 +36,62 @@ static int compat_put_u64(unsigned long arg, u64 val) return put_user(val, (compat_u64 __user *)compat_ptr(arg)); } +struct compat_hd_geometry { + unsigned char heads; + unsigned char sectors; + unsigned short cylinders; + u32 start; +}; + +static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev, + struct compat_hd_geometry __user *ugeo) +{ + struct hd_geometry geo; + int ret; + + if (!ugeo) + return -EINVAL; + if (!disk->fops->getgeo) + return -ENOTTY; + + /* + * We need to set the startsect first, the driver may + * want to override it. + */ + geo.start = get_start_sect(bdev); + ret = disk->fops->getgeo(bdev, &geo); + if (ret) + return ret; + + ret = copy_to_user(ugeo, &geo, 4); + ret |= __put_user(geo.start, &ugeo->start); + if (ret) + ret = -EFAULT; + + return ret; +} + +static int compat_hdio_ioctl(struct inode *inode, struct file *file, + struct gendisk *disk, unsigned int cmd, unsigned long arg) +{ + mm_segment_t old_fs = get_fs(); + unsigned long kval; + unsigned int __user *uvp; + int error; + + set_fs(KERNEL_DS); + error = blkdev_driver_ioctl(inode, file, disk, + cmd, (unsigned long)(&kval)); + set_fs(old_fs); + + if (error == 0) { + uvp = compat_ptr(arg); + if (put_user(kval, uvp)) + error = -EFAULT; + } + return error; +} + #define BLKBSZGET_32 _IOR(0x12, 112, int) #define BLKBSZSET_32 _IOW(0x12, 113, int) #define BLKGETSIZE64_32 _IOR(0x12, 114, int) @@ -93,6 +149,18 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file, int ret; switch (arg) { + case HDIO_GET_UNMASKINTR: + case HDIO_GET_MULTCOUNT: + case HDIO_GET_KEEPSETTINGS: + case HDIO_GET_32BIT: + case HDIO_GET_NOWERR: + case HDIO_GET_DMA: + case HDIO_GET_NICE: + case HDIO_GET_WCACHE: + case HDIO_GET_ACOUSTIC: + case HDIO_GET_ADDRESS: + case HDIO_GET_BUSSTATE: + return compat_hdio_ioctl(inode, file, disk, cmd, arg); /* * No handler required for the ones below, we just need to * convert arg to a 64 bit pointer. @@ -266,6 +334,8 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) struct gendisk *disk = bdev->bd_disk; switch (cmd) { + case HDIO_GETGEO: + return compat_hdio_getgeo(disk, bdev, compat_ptr(arg)); case BLKFLSBUF: case BLKROSET: /* |